Temperature-responsive element



July 22, 1,930 l H. SCHLAICH 1,771,193'

' I I vTEMPEEA'IURE RESPONSIVE ELEMENT Filed Oct. l. 1926 Rw NC E5 M m H ATTORNEY Patented July 22,

HERMAN soHLAIoH, or LONG ISLAND CITY, NEW YORK 1' TEMPERATURE-RESPONSIVE ELEMENT 'Application led October 1, 1926. Serial No. v138,951;`

This'invention relates to temperature re sponsive .elements used in heat 4actuated instruments of the distance type. s

It is an object of the invention to reduce 5 the cost of these elements by manufacturing,

them according to a more economicalmethod than that heretofore followed.

' It is a'furthler object to improve the elements by reducing the material required in their manufacture to render them more com-v pact and at the same time lower the cost of material It is a further object to eect the connection between the element and the' armored capillary tubing insuch` manner that the tubing armor is reinforced and stiifened adjacent the `element and thus rendered less susceptible to breakage or other., damage.,

Other objects and advantages will hereinafter appear. 1 .y

The drawing forming a part of this specification shows a temperature responsive element connected to the capillary tubing and mounted on a supporting member.

rlhe temperature responsive element made in accordance with the present invention comprises a drawn shell l of` ductile metal and a small', iat, metallic plug 2 driven into the upper endof the tube. The plug is driven in far enough to locate its outer face within the bounds of the shell. The plug 2 has-a small opening through it throughl which a capillary tube 3 is inserted. The capillary tube is encased in a braided armor 4:, the lower end of'which is set into a countersink vor recess 5 in the upper face of the plug 2. The plug 2 is sealed in the shell l bythe application of hard solder, 'as silver solder 6 applied over the entire upper face of the plug. This solder iseffective at one operation to seal the space between the'plug and the shell l, 'to seal the space between lthe plug and the capillary tube 3, and to' anchor the lower end of lthe braidedarmor 4. Besides these'functions the silver solder performs still another very. important function. When in a fluid state the solder creeps up thearmor braid 4 by capillary attraction, filling the interstices between the strands of the braid for a sub- "0 stantial distance, perhaps roughly a 'half inc h. This renders the braid quite rigid ad]acent the temperature responsive element so that jolting does not tend to `bend it or to pull it loose.

The/shell 1 has a flange 74 at its upper end, 55 which, in the illustrative embodiment of the i invention, lis utilized for positioning vl`and supporting the element. In associating the element withnthe body whose temperature is to be measured a gasket 8 is first placed on 6o the shell 1 to rest against the lower faceA of the flange 7, andthe element may Athen be inserted through an opening formed in a sup-` porting wall 10 of the body or mechanism whose temperature is to be measured. nut 1l is then screwed 'down into the Wall 10 so that the flange -7 andthe gasket 8 are clamped under pressure between the nut and the bottom of thereeess in the wall l0.

By the described method of manufacture the making of the temperature responsive elements and the connecting of them to thev capillary tubing is considerably simplified and cheapened. Vhere .according to the prior method separate soldering operations had to be performed for securing a stem in the element shell and for sealing the capillary tubing in the stem, these operationsare now combined into a ,single operation and 'such operation serves also to anchor and reinforce the braided armor. l

The provision .of clamping means forl anchoring the lower. end of the .braided armor is obviated and theconnection of the 4armor is more secure thanthat formerly 85 etfected by such clamping means.

The number of parts `required is reduced -and the sizeof the plug is very much less than .'ciated parts forms' a more vcompact unit than heretofore.

Variations'may be resorted to within the i y scope of the invention and parts of the im- 95` provements'may be used withoutothers.

Iclaim: A 1. In a temperature operated device, in

combination, a shell, a plug lying completely Vin the mouth of the shell, a capillarytube in- 100 serted through the plug and solder covering. the face of the plug and sealing the plug to the shell and to the capillary tube.

Lio

2. lIn a temperature operated device, in combination, a shell, a plug lying completely in the mouth of the shell, a capillary tube inserted through the plug, braided armor encasing the capillary tube and terminating adjacent the outer face of the plug, and solder covering the outer face of the plug for sealing the plug to the shell and to the capillary tube and for securing the plug to the braided' 3. In a temperature operated device, in`

combination, a shell, a plug lying completely in the mouth of the shell, a capillary tube inserted through the plug, braided armorencasing the capillary tube and terminating adjacent the outer face of the plug, and solder covering the outer face of the plug for sealing the plug to the shell and to the capillary tube and for securing the plug to the b raided g armor, the solder extending also lalong the braided armor for a `substantial distance out Ward from the plug to stiften' and reinforce the capillary tube.

4. In a temperature operated device, in combination, a shell, a plug lying completelyl in the mouth of the shell, a capillary tube inserted through the plug, braided armor encasing the`c`apillary tube and lterminating adjacent; the outer face of theplug, and hard solder connecting the braided armor to the plug and reinforcing and lstiening the Abraided armor for a substantial distance out- Ward from the plug. I

5. In .a temperature operated device, in combination, a shell, a capillary tube, a plug adapted to lt in the mouth of the shclland having a passage therethrough in vvhich the i capillary tube is received, said plug having `an outwardly facing surface extending from the periphery of the plug to the passage therethrough and being inserted in the shell far enough to locate said surface Within the mouth of the shell, and solder covering said surface of the plug and sealing the plug to the' shell and to the capillary tube.

In testimony whereof I have .affixed my signature to this specification.

' HERMAN SCHLAICI-I. 

